JP2003162903A - Lighting device utilizing microwave - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lighting device utilizing microwave, which is provided with a dielectric mirror for reflecting forward light emitted from an electric lamp. <P>SOLUTION: The lighting device utilizing microwave comprises a waveguide 4 for transmitting microwaves generated from a magnetron 1, a mesh screen 6 for allowing light to pass through it while blocking a leakage of the microwaves, the electric lamp 5, which emits light by the microwaves, the dielectric mirror 10 formed in such a way that it allows the microwaves to pass through it but reflects forward the light emitted from the electric lamp 5 in parallel, and a reflective mirror 7 for reflecting forward the light emitted from the electric lamp 5. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a microwave illuminating device, and more particularly to a microwave illuminating device including a dielectric mirror that reflects the light emitted from a light bulb toward the front side. It relates to the device.

[0002]

2. Description of the Related Art In general, an illumination device using microwaves is a device for emitting visible light or ultraviolet rays by applying microwaves to an electrodeless plasma light bulb, and has a longer life than ordinary incandescent lamps and fluorescent lamps. Is long and has excellent lighting effects.

In such a conventional illumination device using microwaves, as shown in FIG. 3, a magnetron 2 mounted inside the case 1 to generate microwaves,
A high-voltage generator 3 which supplies a high voltage to a common AC power source and supplies it to the magnetron 2, a waveguide 4 for transmitting microwaves generated from the magnetron 2, and an outlet portion of the waveguide 4. And a mesh screen 6 that blocks the leakage of microwaves and allows light to pass through, and the encapsulation material is converted into plasma by the microwave energy that is positioned inside the mesh screen 6 and transmitted through the waveguide 4. And a light bulb 5 for generating.

On the front side of the case 1 in the peripheral area of the mesh screen 6, there is provided a reflecting mirror 7 for intensively reflecting the light generated from the light bulb 5 on the front side.

The microwave transmitted through the waveguide 4 passes through the outlet 4a of the waveguide 4, but the light emitted from the light bulb 5 is reflected to the front side. A dielectric mirror 8 (dielectric mirror) is installed.

Here, the reflecting mirror 7 is formed into a curved surface having a parabolic shape in cross section, but the dielectric mirror 8 is formed into a flat shape, and the shaft portion 5b of the light bulb 5 penetrates through the central portion thereof. Holes 8a for forming are drilled.

On the other hand, a cooling fan assembly 9 for cooling the magnetron 2 and the high pressure generator 3 is provided on the rear side of the case 1.

In the drawing, an unexplained reference numeral 9a is a fan housing,
9b is a blower fan, M1 is a light bulb motor, and M2 is a fan motor.

The operation of the conventional illumination device using microwaves will be described. When a drive signal is input to the high-voltage generator 3, the high-voltage generator 3 boosts the regular AC power source. The magnetron 2 is supplied to the magnetron 2, and the magnetron 2 oscillates at high pressure to generate microwaves having a very high frequency. The microwave generated as described above is emitted to the inside of the mesh screen 6 through the waveguide 4 and discharges the substance enclosed inside the light bulb 5 to generate light having a unique emission spectrum. The light thus generated illuminates the illumination space while being reflected to the front side by the reflecting mirror 7 and the dielectric mirror 8.

[0010]

However, in the above-mentioned conventional illumination device using microwaves, the above-mentioned light bulb is used.
Of the light generated from 5, the light reflected by the reflecting mirror 7 is almost linearly radiated and concentrated, but as shown in FIG. 4, the light reflected by the dielectric mirror 8 is Since the light is scattered in various directions depending on the incident angle, there is a disadvantage that a part of the light emitted from the light bulb 5 is lost while being reflected by the dielectric mirror 8 and the illumination efficiency is reduced.

Further, in order to generate the maximum amount of linear light, the light bulb 5 should be arranged at the focal position of the reflecting mirror 7, but the dielectric mirror 8 has a planar shape and has a focal position. However, it is extremely difficult to accurately dispose the light bulb 5 at the focal position of the reflecting mirror 7 because it is installed close to the.

The present invention has been made in view of the above-mentioned conventional problems, and is configured so that all the light emitted from a light bulb can be radiated into parallel light, thereby minimizing light loss and improving illumination efficiency. An object of the present invention is to provide an illuminating device using microwaves, which can be improved.

Another object of the present invention is to provide a lighting device using microwaves, which enables the light bulb to be easily placed at the focal point of the reflecting mirror and allows easy position selection of the light bulb. is there.

[0014]

In order to achieve the above object, in a lighting device using microwaves according to the present invention, a waveguide for transmitting microwaves generated from a magnetron, and the waveguide. A mesh screen installed at the outlet of the tube to pass light while blocking the leakage of microwaves, a light bulb located inside the mesh screen to emit light by microwaves, and an outlet of the waveguide Installed on the surface of the mesh screen, a dielectric mirror formed so as to allow microwaves to pass through and the light emitted from the light bulb to be reflected in parallel to the front side. And a reflecting mirror that reflects the emitted light to the front side.

The dielectric mirror is formed in a non-planar shape.

The dielectric mirror is formed in a streamlined sectional shape having a predetermined curvature.

A light bulb is arranged at the focal point of the dielectric mirror.

The dielectric mirror has a curvature similar to that of the reflecting mirror.

The light bulb is arranged at the focal point of a parabolic curve composed of the dielectric mirror and the reflecting mirror.

A light bulb shaft connected to the light bulb is passed through an outlet of the waveguide, and a hole for the light bulb shaft to pass through is formed in the dielectric mirror.

A mirror installation portion for installing the dielectric mirror is formed at the exit of the waveguide so as to project inward.

The mirror installation portion is formed at an end portion of the exit portion of the waveguide.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

In the illumination device using microwaves according to the present invention, as shown in FIGS. 1 and 2, the magnetron 2 mounted inside the case 1 to generate microwaves is used.
And boosting the AC power supply to high voltage, the magnetron 2
Is installed at the high-voltage generator 3 for supplying the microwave, the waveguide 4 for transmitting the microwave generated from the magnetron 2, and the outlet 4a of the waveguide 4, and blocks the microwave and allows the light to pass therethrough. A mesh screen (6) and a light bulb (5) located inside the mesh screen (6) and generating light while the encapsulating substance inside is plasmatized by the microwave energy transmitted through the waveguide (4). Composed.

Around the mesh screen 6, a reflecting mirror 7 for intensively reflecting the light generated from the light bulb 5 on the front side is fixedly installed on the case 1, and the reflection mirror 7 on the rear side of the light bulb 5 is installed. A dielectric mirror 10 that allows the passage of microwaves and reflects light is attached to the exit 4a of the waveguide 4.

Here, the dielectric mirror 10 is formed so as to have the same curvature as that of the reflecting mirror 7 having a parabolic cross section, that is, a streamlined cross-sectional shape, and the central portion thereof has the light bulb.
A hole 10a through which the shaft portion 5b of 5 is penetrated is formed.

Inside the exit 4a of the waveguide 4, a mirror installation portion 4b for attaching and fixing the dielectric mirror 10 is formed in a circular ring shape.

At this time, the mirror mounting portion 4b is formed as close as possible to the end portion of the exit portion 4a of the waveguide 4, and when the dielectric mirror 10 is mounted, the dielectric It is preferable that the protrusion height of the outlet portion 4b is minimized between the mirror 10 and the reflecting mirror 7.

The light bulb 5 is arranged such that the center of the light emitting portion 5a is located at the focal position of the parabolic curve structure formed by the reflecting mirror 7 and the dielectric mirror 7.

Therefore, the dielectric mirror 10 is attached while being supported by the mirror installation portion 4b formed at the end portion of the exit portion 4a of the waveguide 4, or by a caulking method or the like. The position of the reflector 7 is fixed.
A parabolic curve structure is formed together with and the light generated from the light bulb 5 is reflected in parallel to the front side.

On the other hand, the dielectric mirror 10 includes the light bulb 5
If the angle of the light reflected with respect to the incident angle of the light generated from irradiates the front side in parallel, the non-curved shape may be used.

That is, the dielectric mirror 10 shown in FIGS.
Even if it is not formed into a curved shape as shown in
The non-curved planar structure may be formed so that the light emitted from 5 is reflected in parallel in view of the ratio of the incident angle to the reflection angle and is emitted to the front side.

In the drawing, an unexplained reference numeral 9a is a fan housing,
9b is a fan, M1 is a bulb motor, M2 is a fan motor,
Are shown respectively.

The operation and effect of the illuminating device using the microwave according to the present invention having the above-described structure will be described below.

First, when the common AC power source is boosted by the high voltage generator 3 and supplied to the magnetron 2, microwaves are generated from the magnetron 2 and radiated into the mesh screen 6 through the waveguide 4. It

The microwave thus radiated discharges the substance enclosed in the light emitting portion 5a of the light bulb 5 to generate light, and a part of the light thus generated from the light bulb 5 is generated. Is reflected to the front side by the reflecting mirror 7 and the dielectric mirror 10 to illuminate the illumination space.

At this time, a part of the light emitted from the light bulb 5 is reflected by the parabolic reflecting mirror 7 and is radiated parallel to the front side, and the light emitted to the rear side of the light bulb 5 is also Figure 2
As shown in, the light is reflected by the parabolic dielectric mirror 10 and is irradiated in parallel to the front side.

As described above, the reflecting mirror 7 and the dielectric mirror 1
Since 0 forms one parabolic curve, when the center of the light emitting portion 5a of the light bulb 5 is located at the focus of the parabolic curve, the light emitted from the light emitting portion 5a of the light bulb 5 is reflected by the reflecting mirror 7 Also, when the light is reflected by the dielectric mirror 10, most of the light is converted into collimated light and emitted, so that the brightness of the lighting system is improved for the same amount of input, and thus the power consumption of the entire lighting system is effectively increased. Can be reduced to

[0039]

As described above, in the illuminating device using microwaves according to the present invention, the reflecting mirror and the dielectric mirror are configured such that all the light emitted from the light bulb is emitted as parallel light. By doing so, it is possible to minimize the loss of light and improve the illumination efficiency, and since the light bulb is arranged at the focal position of the reflecting mirror, there is an effect that the position selection and installation work of the light bulb can be easily performed.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing an illumination device using microwaves according to the present invention.

FIG. 2 is a detailed view of a main part of FIG. 1 for explaining the operation of the dielectric mirror shown in FIG.

FIG. 3 is a vertical cross-sectional view showing a conventional illumination device using microwaves.

FIG. 4 is a detailed view for explaining the dielectric mirror shown in FIG.

[Explanation of symbols]

1 ... Case 2 ... Magnetron 3 High voltage generator 4 ... Waveguide 4a ... Exit 4b… Mirror installation section 5 ... bulb 6 ... mesh screen 7 ... Reflector 10 ... Dielectric mirror 10a ... Hall

Claims (10)

[Claims] 1. A waveguide for transmitting microwaves generated from a magnetron, a mesh screen installed at an exit of the waveguide for blocking microwave leakage and allowing light to pass therethrough, A light bulb located inside the screen, which emits light by microwaves, is installed at the exit of the waveguide, allows microwaves to pass through, and the light emitted from the light bulb is reflected in parallel to the front side. A microwave is provided, which comprises: a dielectric mirror formed so as to have a reflection mirror; and a reflection mirror installed around the mesh screen to reflect the light emitted from the light bulb toward the front side. Lighting equipment. 2. The illumination device using microwaves according to claim 1, wherein the dielectric mirror is formed in a non-planar shape. 3. The illumination device using microwaves according to claim 1, wherein the dielectric mirror is formed in a streamlined cross-sectional shape having a predetermined curvature. 4. The illumination device using microwaves according to claim 3, wherein the light bulb is arranged at a focal point of the dielectric mirror. 5. The illumination device using microwaves according to claim 1, wherein the dielectric mirror has a curvature similar to that of the reflecting mirror. 6. The illumination device using microwaves according to claim 5, wherein the light bulb is arranged at a focal point of a parabolic curve formed by the dielectric mirror and the reflecting mirror. 7. The light bulb shaft connected to the light bulb passes through an outlet of the waveguide, and the dielectric mirror is formed with a hole for allowing the light bulb shaft to pass therethrough. An illumination device using the microwave according to claim 1. 8. The microwave of claim 1, wherein a mirror installation portion for installing the dielectric mirror is formed at an exit portion of the waveguide so as to project inward. Lighting equipment used. 9. The illumination device using microwaves according to claim 1, wherein the mirror installation portion is formed at an end portion of an exit portion of the waveguide. 10. A waveguide for transmitting microwaves generated from a magnetron, a mesh screen installed at an exit of the waveguide for blocking microwave leakage and transmitting light. A light bulb located inside the screen, which emits light by microwaves, and which is installed on the rear side of the light bulb so that the microwaves pass through and the light emitted from the light bulb is reflected in parallel to the front side. An illuminating device using microwaves, comprising: a dielectric mirror formed on the.